Growing community of inventors

Koka, Japan

Katsuaki Ohba

Average Co-Inventor Count = 5.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 3

Katsuaki OhbaMoriyasu Masui (2 patents)Katsuaki OhbaMichio Masuko (2 patents)Katsuaki OhbaToshikazu Ohtsuka (2 patents)Katsuaki OhbaTakami Takeda (2 patents)Katsuaki OhbaKatsuaki Ohba (2 patents)Moriyasu MasuiMoriyasu Masui (30 patents)Michio MasukoMichio Masuko (17 patents)Toshikazu OhtsukaToshikazu Ohtsuka (9 patents)Takami TakedaTakami Takeda (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Shionogi Company Limited (2 from 1,001 patents)


2 patents:

1. 5519139 - Aminopyrimidine derivatives and their production and use

2. 5439911 - Aminopyrimidine derivatives and their production and use

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1/3/2026
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